Lighting fixture



FIG. 1 is a perspective view of my new design for a lighting fixture;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a front side view thereof, the back side view being a mirror image thereof.

The broken lines shown on the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a lighting fixture, as shown and described. 